Topic Last Modified: 2012-09-21

The following example shows how an administrator can define a failover route for use if the Dallas-GW1 is down for maintenance or is otherwise unavailable. The following tables illustrate the required configuration change.

Table 1. User Policy

User policy	Phone usage
Default Calling Policy	Local GlobalPSTNHopoff
Redmond Local Policy	RedmondLocal
Dallas Calling Policy	DallasUsers GlobalPSTNHopoff

Table 2. Routes

Route name	Number pattern	Phone usage	Trunk	Gateway
Redmond Local Route	^\+1(425|206|253)(\d{7})$	Local RedmondLocal	Trunk1 Trunk2	Red-GW1 Red-GW2
Dallas Local Route	^\+1(972|214|469)(\d{7})$	Local	Trunk3	Dallas-GW1
Universal Route	^\+?(\d*)$	GlobalPSTNHopoff	Trunk1 Trunk2 Trunk3	Red-GW1 Red-GW2 Dallas-GW1
Dallas Users Route	^\+?(\d*)$	DallasUsers	Trunk3	Dallas-GW1

In Table 1, a phone usage of GlobalPSTNHopoff is added after the DallasUsers phone usage in the Dallas Calling Policy. This enables calls with the Dallas Calling policy to use routes that are configured for the GlobalPSTNHopoff phone usage if a route for the DallasUsers phone usage is unavailable.